If it's either a 2.0 8v or 16v you don't need new hubs
You just need the callipers and carriers
a 2.0 16v already has 280mm brakes.
a 2.0 8v only has 256mm brakes, but can easily be upgraded to 280mm.
Brembo's will fit, you just need to find some wheels that will clear them !!!
AP Racing also do big brakes that fit, along with Wilwood, Tarox..... the list goes on!!
Basically, anything that will fit a
Mk3 Ibiza will fit a Mk2 (same hubs)
Andy